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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script type="text/javascript">
        // var arrayLike = {
        // 	"0": "张三",
        // 	"1": "李四",
        // 	"2": "王五",
        // 	"length": 3
        // }

        // var ary = Array.from(arrayLike);
        // console.log(ary)

        var arrayLike = {
            "0": "1",
            "1": "2",
            "length": 2
        }
        var ary = Array.from(arrayLike, item => item * 2);
        
        console.log(ary);
    </script>
</body>

</html>